Motocrossed

Motocrossed is a 2001 Disney Channel Original Movie about a girl named Andrea Carson who loves motocross, despite the fact that her father finds her unsuited for the sport, being that she is just a girl. When her twin brother Andrew dislocates his knee just before a big race, their father is forced to go to Europe to find a replacement rider. In the meantime, Andrea secretly races in Andrews place with her mothers help. The movie is a loose adaptation of William Shakespeares Twelfth Night.

Twin sister Andrea Andi Carson Alana Austin finds herself in a bind when her love for motocross racing provokes her overprotective father, Edward Timothy Carhart, who is averse to the idea of his daughter participating in such a dangerous sport and prefers that she stick to girl things. When their parents are out of the house for the day, Andrea and Andrew decide to have a friendly race on the family track. While racing, Andrew ends up losing control of his bike, causing him to be thrown off and crash into the fence, injuring his knee which renders him unable to race in the Cup. Edward is forced to quit his job, dipping into the familys finances to find a replacement rider from Europe.Fueled by her desire to get on the track and feeling guilty over her brothers injury, Andrea formulates a plan to masquerade as her brother, to which Andrew reluctantly agrees. Andrea is welcomed by unfriendly competition and comes back home with a scrape on her arm, which makes her mother, Geneva MaryMargaret Humes, suspicious. After dragging the answer out of youngest son Jason Scott Terra and a whole night to think it over, Geneva secretly and reluctantly agrees to let Andrea race in Andrews place. The catch, however, is that this all needs to happen behind Edwards back, and before he comes home with a replacement rider. ........

Source: Wikipedia